到2010年底，我国投入运营的高速铁路约7500千米，图3显示我国某段高速铁路景观。据此完成问题。
为了保持列车高速运行，高速铁路选线时首要考虑的自然因素是
| A．地形 | B．地质 | C．气候 | D．水文 |
在平原地区，修建高速铁路时多采用高架的方式。主要是为了
| A．减少噪音扰民 | B．较少占用耕地 | C．缩短运营里程 | D．保护野生动物 |
相关试题
By the end of 2025， garbage﹣sorting systems （垃圾分类系统） will be ________in Dongying．（ ）
A．set upB．given up
C．shut offD．brought out
We should _________to buy products that come from wild animals． A large number of them are in danger．（ ）
A．stopB．decideC．refuseD．continue
We asked 200 students in our school about whether they wanted a younger brother or sister．Here are the results．
It shows that ________percent of them don't want to have one． This is a big problem．（ ）
A．10B．40C．50D．80
Many students hated to have classes on DingTalk，________they gave it one﹣star reviews（评价）．（ ）
A．soB．orC．butD．while
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